CN113832999A - Intelligent control system and control method for sand-gravel stratum deep foundation pit dewatering - Google Patents
Intelligent control system and control method for sand-gravel stratum deep foundation pit dewatering Download PDFInfo
- Publication number
- CN113832999A CN113832999A CN202111062653.9A CN202111062653A CN113832999A CN 113832999 A CN113832999 A CN 113832999A CN 202111062653 A CN202111062653 A CN 202111062653A CN 113832999 A CN113832999 A CN 113832999A
- Authority
- CN
- China
- Prior art keywords
- precipitation
- experimental
- well
- dewatering
- working
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides an intelligent control system and method for sand-gravel stratum deep foundation pit dewatering, and belongs to the field of civil engineering. The control system comprises an experimental precipitation area, wherein N experimental precipitation wells are arranged at the edge of the experimental precipitation area, N is an integer larger than or equal to 1, specific i experimental precipitation wells are used as the optimal experimental precipitation well combination, an experimental observation well is arranged at the center of the experimental precipitation area, and i is smaller than or equal to N; the working precipitation area is arranged in parallel with the experimental precipitation area, i working precipitation wells are arranged at the edges and/or the center of the working precipitation area, water pumps are arranged in the working precipitation wells, and each working precipitation well is arranged in one-to-one correspondence with the experimental precipitation well in the optimal experimental precipitation well combination. The control method is based on the system. The invention can reduce the adverse effect of the saturated precipitation mode in the prior art on the foundation pit and the surrounding environment, and improve the construction safety.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to an intelligent control system and a control method for sand-gravel stratum deep foundation pit dewatering.
Background
Before a large subway station excavates a deep foundation pit, precipitation needs to be carried out in advance, a precipitation well is generally arranged outside the pit in a sandy gravel stratum, but the excavation depths of different sections of the foundation pit are different, the precipitation depths are different, and the traditional precipitation well precipitation method has the advantages that the method of reducing water to the lowest position is adopted to greatly influence the foundation pit and the surrounding environment no matter how much the excavation depth is, so that great potential safety hazards exist.
Disclosure of Invention
The invention provides an intelligent control system and a control method for sand-gravel stratum deep foundation pit dewatering, which can determine proper water pumping flow, dewatering well combination and working time according to excavation depth change, and avoid resource waste and potential safety hazards caused by excessive dewatering.
The invention is realized by the following steps:
an intelligent control system for sand-gravel stratum deep foundation pit dewatering comprises an experimental dewatering area, wherein N experimental dewatering wells are arranged at the edge of the experimental dewatering area, N is an integer larger than or equal to 1, a specific i number of experimental dewatering wells serve as an optimal experimental dewatering well combination, i is smaller than or equal to N, an experimental observation well is arranged at the center of the experimental dewatering area, a water pump is arranged in each experimental dewatering well, and a water level detector is arranged in each experimental dewatering well and each experimental observation well; the working precipitation area is arranged in parallel with the experimental precipitation area, i working precipitation wells are arranged at the edges and/or the center of the working precipitation area, water pumps are arranged in the working precipitation wells, and each working precipitation well is in one-to-one correspondence with the experimental precipitation well in the optimal experimental precipitation well combination.
Optionally, a water level controller is arranged in the working dewatering well, and the water level controller is connected with the water pump in the working dewatering well and used for controlling the water pump in the working dewatering well to be opened or closed.
Optionally, the water quality monitoring device is further included and is used for monitoring the water quality of the water pumped by the water pump.
An intelligent control method for sand-gravel stratum deep foundation pit dewatering comprises the following steps:
dividing a foundation pit area to be excavated into at least one experimental precipitation area and at least one working precipitation area;
excavating N experimental precipitation wells and at least one experimental observation well in the experimental precipitation area, selecting j experimental precipitation wells from the N experimental precipitation wells as a precipitation well combination, enabling a water pump in the precipitation well combination to work at a preset flow rate, pumping water for a preset time length, and observing the water level change condition in the experimental observation wells within the preset time length;
step three, stopping pumping water after the single experiment is finished, and recovering the water level in the precipitation well to be tested;
step four, changing the combination of the dewatering wells, enabling the combination of the dewatering wells to traverse all combination situations of the N experimental dewatering wells, and repeating the step two and the step three;
step five, changing the pumping flow, and repeating the step two, the step three and the step four;
and step six, determining the precipitation well combination and the pumping flow adopted by the precipitation working area according to the pumping flow, the change relation between the precipitation well combination and the experimental observation well water level, the precipitation depth required by the working precipitation area and the precipitation duration allowed by the construction progress obtained in the step two to the step five.
Optionally, in the step one: and dividing the experimental precipitation area and the working precipitation area according to the design height of the platform in the foundation pit.
Optionally, in the fifth step, a reference pumping flow rate is determined, and the test is performed with 0.5 time of the reference pumping flow rate, 1 time of the pumping flow rate, and 2 times of the pumping flow rate.
Optionally, the method for determining the reference pumping flow rate comprises the following steps:
in the formula:
q is the reference pumping flow;
k-permeability coefficient (m/d);
H0-thickness (m) of the aqueous layer;
r-precipitation impact radius (m);
r0-pit equivalent radius (m);
h is the depth (m) from the dynamic water level of the foundation pit to the bottom surface of the aquifer;
l-length of the active working part of the filter tube (m).
Optionally, the area corresponding to the deepest design position of the foundation pit is divided into a precipitation experimental area.
Alternatively, R ═ 2S (KH)0)1/2
In the formula, S is the water level depth, and the unit is m;
k is the permeability coefficient, and the unit is m/day;
H0the thickness of the aqueous layer in m.
Optionally, r0＝(A/π)1/2
Wherein, A is the area of the foundation pit and the unit is m2。
The invention has the beneficial effects that: the invention relates to an intelligent control system and a control method for sand-gravel stratum deep foundation pit dewatering, which are obtained through the design. The edge of experiment precipitation district is provided with N experiment precipitation well, and N is the integer that is more than or equal to 1, and wherein, specific i experiment precipitation well is less than or equal to N as the best experiment precipitation well combination, and the center department in experiment precipitation district is provided with the experiment observation well, is equipped with the water pump in the experiment precipitation well, all is equipped with water level detector in experiment precipitation well and the experiment observation well. The working precipitation area is equal to the experimental precipitation area in size and is arranged in parallel, i working precipitation wells are arranged at the edges and/or the center of the working precipitation area, water pumps are arranged in the working precipitation wells, and each working precipitation well is in one-to-one correspondence with the experimental precipitation well in the optimal experimental precipitation well combination.
The intelligent control system for the sand-gravel stratum deep foundation pit dewatering can be used for realizing the following control method: dividing a foundation pit area to be excavated into at least one experimental precipitation area and at least one working precipitation area; excavating N experimental precipitation wells and at least one experimental observation well in the experimental precipitation area, selecting j experimental precipitation wells from the N experimental precipitation wells as a precipitation well combination, enabling a water pump in the precipitation well combination to work at a preset flow rate, pumping water for a preset time length, and observing the water level change condition in the experimental observation wells within the preset time length; step three, stopping pumping water after the single experiment is finished, and recovering the water level in the precipitation well to be tested; step four, changing the combination of the dewatering wells, increasing the value of j from 1 to N one by one, traversing all combination situations of the N experimental dewatering wells by the combination of the dewatering wells, and repeating the step two and the step three; step five, changing the pumping flow, and repeating the step two, the step three and the step four; and step six, determining the precipitation well combination and the pumping flow adopted by the precipitation working area according to the pumping flow, the change relation between the precipitation well combination and the experimental observation well water level, the precipitation depth required by the working precipitation area and the precipitation duration allowed by the construction progress obtained in the step two to the step five.
By the control system and the control method, before the foundation pit is excavated, precipitation is carried out in the experimental precipitation area, and the relation between the water level change and the pumping flow of the excavation area is recorded, so that the pumping work in the working precipitation area is guided, the adverse effect of the saturated precipitation mode in the prior art on the foundation pit and the surrounding environment can be reduced, and the construction safety is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of excavation depths of respective areas in an application example of the present invention.
Fig. 2 is a schematic diagram showing the division of the experimental precipitation zone and the working precipitation zone in the application example of the present invention.
FIG. 3 is a schematic diagram showing the variation of water level with time obtained by using the first experimental precipitation well as the precipitation well in the application example of the present invention.
FIG. 4 is a schematic diagram showing the variation of water level with time obtained by combining the first experimental precipitation well and the second experimental precipitation well as precipitation wells in the application example of the present invention.
FIG. 5 is a schematic diagram showing the variation of water level with time obtained by combining the first, second and third experimental precipitation wells as precipitation wells in an application example of the present invention.
FIG. 6 is a schematic diagram showing the variation of water level with time obtained by combining the first, second, third and fourth experimental precipitation wells as precipitation wells in an application example of the present invention.
Fig. 7 is a schematic flow chart of a control method provided by the present invention.
Icon: 1-experimental dewatering area; 11-a first experimental precipitation well; 12-second experiment dewatering well; 13-third experiment dewatering well; 14-a fourth experimental dewatering well; 2-a working precipitation area; 21-working dewatering well.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Examples
The embodiment of the invention provides an intelligent control system and a control method for sand-gravel stratum deep foundation pit dewatering. An intelligent control system for sand-gravel stratum deep foundation pit dewatering comprises an experimental dewatering area and a working dewatering area. The edge in experiment precipitation district is provided with N experiment precipitation well, and N is more than or equal to 1's integer, and wherein, specific i experiment precipitation well is less than or equal to N as the best combination of experiment precipitation well, the center department in experiment precipitation district is provided with the experiment observation well, be equipped with the water pump in the experiment precipitation well, experiment precipitation well with all be equipped with water level detector in the experiment observation well. The working precipitation area and the experimental precipitation area are arranged in parallel, i working precipitation wells are arranged at the edges and/or the center of the working precipitation area, water pumps are arranged in the working precipitation wells, and each working precipitation well is in one-to-one correspondence with the experimental precipitation well in the optimal experimental precipitation well combination. Preferably, the size of the working dewatering zone may be equal or substantially equal to the experimental dewatering zone.
In some embodiments, a water level controller is arranged in the working dewatering well, and the water level controller is connected with the water pump in the working dewatering well and used for controlling the water pump in the working dewatering well to be turned on or turned off. And when the water level controller detects that the water level in the working dewatering well falls to a preset value, the water pump is controlled to be closed. This helps to reduce the labor burden on the worker.
In some embodiments, the intelligent control system for the sandy gravel stratum deep foundation pit precipitation further comprises a water quality monitoring device for monitoring the water quality of the water pumped by the water pump. For example, the water quality monitoring device can be for the device that can detect the sand content, detects through the sand content to the extract water, can judge the loss condition of stratum sandy, avoids losing too much and causes the potential safety hazard.
Referring to fig. 7, based on the intelligent control system for the sand and gravel stratum deep foundation pit dewatering, the following intelligent control method for the sand and gravel stratum deep foundation pit dewatering can be realized:
dividing a foundation pit area to be excavated into at least one experimental precipitation area and at least one working precipitation area;
excavating N experimental precipitation wells and at least one experimental observation well in the experimental precipitation area, selecting j experimental precipitation wells from the N experimental precipitation wells as a precipitation well combination, enabling a water pump in the precipitation well combination to work at a preset flow rate, pumping water for a preset time length, and observing the water level change condition in the experimental observation wells within the preset time length;
step three, stopping pumping water after the single experiment is finished, and recovering the water level in the precipitation well to be tested;
step four, changing the combination of the dewatering wells, enabling the combination of the dewatering wells to traverse all combination situations of the N experimental dewatering wells, and repeating the step two and the step three;
step five, changing the pumping flow, and repeating the step two, the step three and the step four;
and step six, determining the precipitation well combination and the pumping flow adopted by the precipitation working area according to the pumping flow, the change relation between the precipitation well combination and the experimental observation well water level, the precipitation depth required by the working precipitation area and the precipitation duration allowed by the construction progress obtained in the step two to the step five.
In the first step, the experimental precipitation area and the working precipitation area are divided according to the design height of a platform in a foundation pit. For example, in the case of excavating a subway station, the platform of the station hall is located higher than the platform, and the excavation depths of the station hall and the platform are naturally different. The pollen experiment dewatering area and the working dewatering area can be distinguished according to the excavation depth.
Furthermore, the experimental precipitation area is arranged at the deepest excavation depth part. This facilitates the gathering of more precipitation data.
And in the fifth step, determining the reference pumping flow, and performing tests respectively according to the 0.5-time reference pumping flow, the 1-time pumping flow and the 2-time pumping flow.
The method for determining the reference pumping flow comprises the following steps:
in the formula:
q is the reference pumping flow;
k-permeability coefficient (m/d);
H0-thickness (m) of the aqueous layer;
r-precipitation impact radius (m);
r0-pit equivalent radius (m);
h is the depth (m) from the dynamic water level of the foundation pit to the bottom surface of the aquifer;
l-length of the active working part of the filter tube (m).
Wherein, K, H0、R、r0H and l can be measured and obtained by inquiring or calculating according to the existing parameters.
Specifically, the method comprises the following steps:
R＝2S(KH0)1/2
in the formula, S is the water level depth, and the unit is m;
k is the permeability coefficient, and the unit is m/day;
H0-containing waterLayer thickness in m.
r0＝(A/π)1/2
Wherein, A is the area of the foundation pit and the unit is m2。
By the control system and the control method, before the foundation pit is excavated, precipitation is carried out in the experimental precipitation area, and the relation between the water level change and the pumping flow of the excavation area is recorded, so that the pumping work in the working precipitation area is guided, the adverse effect of the saturated precipitation mode in the prior art on the foundation pit and the surrounding environment can be reduced, and the construction safety is improved.
The following is illustrated by way of an example:
as shown in fig. 1, the excavation depth of the left and right sides of the foundation pit is relatively deep, the excavation depth of the middle part of the foundation pit is relatively shallow, the foundation pit is divided into four regions, as shown in fig. 2, the deeper parts of the excavation depth of the left and right sides are respectively one region, the middle part of the foundation pit is divided into two regions according to the area size, the left region is used as an experimental precipitation region 1, and a first working precipitation region 2, a second working precipitation region 2 and a third working precipitation region 2 are sequentially arranged from left to right. Four experimental precipitation wells, namely a first experimental precipitation well 11, a second experimental precipitation well 12, a third experimental precipitation well 13 and a fourth experimental precipitation well 14 are arranged at four corners of the experimental precipitation area 1, and then an experimental observation well 15 is arranged in the middle. A water suction pump and a water level detector are arranged in the experimental precipitation well, and a water suction pump and a water level detector are arranged in the experimental observation well 15.
Before the experiment begins, the standard pumping flow is calculated according to the following formula:
in the formula:
q is the reference pumping flow;
k-permeability coefficient (m/d);
H0-thickness (m) of the aqueous layer;
r-precipitation impact radius (m);
r0-pit equivalent radius (m);
h is the depth (m) from the dynamic water level of the foundation pit to the bottom surface of the aquifer;
l-length of the active working part of the filter tube (m).
Wherein, K, H0、R、r0H and l can be measured and obtained by inquiring or calculating according to the existing parameters. Specifically, the method comprises the following steps:
K、H0can be obtained through geological exploration.
R＝2S(KH0)1/2
In the above formula, S is the water level lowering, and the numerical value can be determined according to the construction requirement; k is the permeability coefficient obtained from geological exploration, H0The aquifer thickness is obtained for geological exploration.
r0＝(A/π)1/2
Wherein A is the area of the foundation pit.
l is the effective working part length of the filter in the dewatering well and can be obtained through measurement.
During the experiment, one dewatering well is selected as the dewatering well combination, specifically, the first experiment dewatering well 11, the second experiment dewatering well 12, the third experiment dewatering well 13 and the fourth experiment dewatering well 14 are respectively used as the dewatering well combination, for each dewatering well combination, the water pump pumping flow is respectively 0.5Q, Q and 2Q, three times of experiments are carried out, the water level descending condition in the experiment observation well 15 is observed, and a curve of the water level changing along with time is obtained. When the first experimental precipitation well 11 pumps water, the second experimental precipitation well 12, the third experimental precipitation well 13 and the fourth experimental precipitation well 14 do not pump water. The rest can be analogized. In this step, four dewatering well combinations are generated, and each dewatering well combination is subjected to three experiments, so that twelve experiments are performed in total for the case where one well is used as a dewatering well combination.
Selecting two dewatering wells as a dewatering well combination, specifically, taking a first experimental dewatering well 11 and a second experimental dewatering well 12 as the dewatering well combination, taking the first experimental dewatering well 11 and a third experimental dewatering well 13 as the dewatering well combination, taking the first experimental dewatering well 11 and a fourth experimental dewatering well 14 as the dewatering well combination, taking the second experimental dewatering well 12 and the third experimental dewatering well 13 as the dewatering well combination, taking the second experimental dewatering well 12 and the fourth experimental dewatering well 14 as the dewatering well combination, taking the third experimental dewatering well 13 and the fourth experimental dewatering well 14 as the dewatering well combination, namely, generating six dewatering well combinations in total, respectively taking the water pump pumping flow as 0.5Q, Q and 2Q, carrying out three times of pumping experiments in the dewatering well combination, observing the water level descending condition in the experimental observation well 15, and obtaining a curve of the water level changing along with time. In this step, there are six dewatering well combinations, each of which will be subjected to three experiments, so that two wells as dewatering well combinations are subjected to eighteen experiments in total. It should be noted that the pumping flow rate refers to the total pumping flow rate of one dewatering well combination. For example, when two dewatering wells are combined as the dewatering wells, the total pumping flow rate is 0.5Q, and the pumping flow rate of each dewatering well is 0.25Q.
Three dewatering wells are selected as a dewatering well combination, specifically, a first experiment dewatering well 11, a second experiment dewatering well 12 and a third experiment dewatering well 13 are used as a dewatering well combination, the first experiment dewatering well 11, the second experiment dewatering well 12 and a fourth experiment dewatering well 14 are used as a dewatering well combination, the first experiment dewatering well 11, the third experiment dewatering well 13 and the fourth experiment dewatering well 14 are used as a dewatering well combination, the second experiment dewatering well 12, the third experiment dewatering well 13 and the fourth experiment dewatering well 14 are used as a dewatering well combination, four dewatering well combinations are provided, the water pumping flow of a water pump is respectively 0.5Q, Q and 2Q, three times of water pumping experiments are carried out in the dewatering well combination, the water level reduction condition in the experiment observation well 15 is observed, and a curve of the water level changing along with time is obtained. In this step, there are four dewatering well combinations, each of which is subjected to three experiments, so that twelve experiments are performed in total for three wells as the dewatering well combinations.
Four dewatering wells are selected as a dewatering well combination, namely the first experiment dewatering well 11, the second experiment dewatering well 12, the third experiment dewatering well 13 and the fourth experiment dewatering well 14 are used for pumping water simultaneously, the total pumping flow is set to be 0.5Q, Q and 2Q respectively, and three experiments are carried out. And observing the water level reduction condition in the experimental observation well 15, and obtaining a curve of the water level change along with the time.
After the pumping experiment of each time is finished, the experiment is stopped for a period of time, and the next experiment is carried out after the formation water is recovered. Forty-five experiments were thus performed in total to obtain a plot of precipitation versus pumping time for forty-five different situations. Twelve curves are selected as shown in fig. 3-6 (for comparison, the water level drop of the same precipitation well combined under three different flow rates is plotted in the same coordinate system). In the figure, the vertical axis of the coordinate is the groundwater level, and the horizontal axis is the precipitation time. Fig. 3 is a graph of the first experimental precipitation well 11 as a precipitation well combination. Fig. 4 is a graph of the combination of the first experimental precipitation well 11 and the second experimental precipitation well 12 as precipitation wells. Fig. 5 is a graph of the combination of the first experimental precipitation well 11, the second experimental precipitation well 12 and the third experimental precipitation well 13 as precipitation wells. Fig. 6 is a graph of the combination of the first experimental precipitation well 11, the second experimental precipitation well 12, the third experimental precipitation well 13 and the fourth experimental precipitation well 14 as precipitation wells.
And when the working precipitation area 2 is subjected to precipitation operation, selecting precipitation well combination and pumping flow according to the obtained curve. For example:
if the water level is required to be lowered from 20m to 15m in 24 hours, the first experimental precipitation well 11 is set as the optimal precipitation well combination with a flow rate of 2Q, and water can be pumped only in the working precipitation well 21 corresponding to the first experimental precipitation well 11.
If the water level is required to be lowered from 20m to 14m in 24 hours, the first experimental precipitation well 11 and the second experimental precipitation well 12 are combined as the optimal precipitation well at the flow rate of Q, and water can be pumped in the working precipitation well 21 corresponding to the first experimental precipitation well 11 and the second experimental precipitation well 12.
If the water level is required to be lowered from 20m to 12m in 24 hours, the first experimental precipitation well 11, the second experimental precipitation well and the third experimental precipitation well 13 may be combined as an optimal precipitation well at a flow rate of 2Q, and water may be pumped through the working precipitation wells 21 corresponding to the first experimental precipitation well 11, the second experimental precipitation well 12 and the third experimental precipitation well 13.
If the water level is required to be lowered from 20m to 10m in 24 hours, the first experiment dewatering well 11, the second experiment dewatering well 12, the third experiment dewatering well 13 and the fourth experiment dewatering well 14 can be combined as the optimal dewatering well at a flow rate of 2Q, and water can be pumped in the working dewatering wells 21 corresponding to the first experiment dewatering well 11, the second experiment dewatering well 12, the third experiment dewatering well 13 and the fourth experiment dewatering well 14 at the same time.
According to the above situation, the working dewatering well 21 can be excavated in the working dewatering area 2 in a targeted manner. For example, if it is necessary to pump water in the working dewatering wells 21 corresponding to the first experimental dewatering well 11 and the second experimental dewatering well 12, two working dewatering wells 21 may be excavated at positions corresponding to the first experimental dewatering well 11 and the second experimental dewatering well 12 in the working dewatering area 2.
The position of the deeper foundation pit is divided into an experimental precipitation area 1, enough data can be obtained, and the precipitation condition of the working precipitation area 2 can be accurately predicted.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a sandy gravel stratum deep basal pit dewatering intelligence control system which characterized in that includes:
the experimental precipitation area is provided with N experimental precipitation wells at the edge, N is an integer greater than or equal to 1, wherein specific i experimental precipitation wells are used as the optimal experimental precipitation well combination, i is less than or equal to N, an experimental observation well is arranged at the center of the experimental precipitation area, a water pump is arranged in each experimental precipitation well, and a water level detector is arranged in each experimental precipitation well and each experimental observation well;
the working precipitation area is arranged in parallel with the experimental precipitation area, i working precipitation wells are arranged at the edges and/or the center of the working precipitation area, water pumps are arranged in the working precipitation wells, and each working precipitation well is arranged corresponding to the experimental precipitation well in the optimal experimental precipitation well combination.
2. The intelligent control system for deep foundation pit dewatering in sandy gravel stratum according to claim 1, wherein a water level controller is arranged in the working dewatering well, and the water level controller is connected with the water pump in the working dewatering well and used for controlling the water pump in the working dewatering well to be turned on or turned off.
3. The intelligent control system for the deep foundation pit dewatering in the sandy gravel stratum as claimed in claim 1, further comprising a water quality monitoring device for monitoring the water quality of the water pumped by the water pump.
4. An intelligent control method for sand-gravel stratum deep foundation pit dewatering is characterized by comprising the following steps:
dividing a foundation pit area to be excavated into at least one experimental precipitation area and at least one working precipitation area;
excavating N experimental precipitation wells and at least one experimental observation well in the experimental precipitation area, selecting j experimental precipitation wells from the N experimental precipitation wells as a precipitation well combination, enabling a water pump in the precipitation well combination to work at a preset flow rate, pumping water for a preset time length, and observing the water level change condition in the experimental observation wells within the preset time length;
step three, stopping pumping water after the single experiment is finished, and recovering the water level in the precipitation well to be tested;
step four, changing the combination of the dewatering wells, increasing the value of j from 1 to N one by one, traversing all combination situations of the N experimental dewatering wells by the combination of the dewatering wells, and repeating the step two and the step three;
step five, changing the pumping flow, and repeating the step two, the step three and the step four;
and step six, determining the precipitation well combination and the pumping flow adopted by the precipitation working area according to the pumping flow, the change relation between the precipitation well combination and the experimental observation well water level, the precipitation depth required by the working precipitation area and the precipitation duration allowed by the construction progress obtained in the step two to the step five.
5. The intelligent control method for deep foundation pit dewatering in sandy gravel stratum according to claim 4, characterized in that in the first step:
and dividing the experimental precipitation area and the working precipitation area according to the design height of the platform in the foundation pit.
6. The intelligent control method for the deep foundation pit dewatering in the sandy gravel stratum as claimed in claim 4, wherein in said step five, a reference pumping flow rate is determined, and tests are respectively carried out with 0.5 times of the reference pumping flow rate, 1 time of the pumping flow rate and 2 times of the pumping flow rate.
7. The intelligent control method for the deep foundation pit dewatering in the sandy gravel stratum as claimed in claim 6, wherein the method for determining the reference pumping flow rate is as follows:
in the formula:
q is the reference pumping flow;
k-permeability coefficient in m/day;
H0-aquifer thickness in m;
r-precipitation influence radius, unit is m;
r0-the equivalent radius of the foundation pit is m;
h is the depth from the dynamic water level of the foundation pit to the bottom surface of the aquifer, and the unit is m;
l is the length of the effective working part of the filter tube, and the unit is m.
8. The intelligent control method for the rainfall in the sandy gravel stratum deep foundation pit as claimed in claim 4, wherein the area corresponding to the deepest design position of the foundation pit is divided into a rainfall experiment area.
9. The intelligent control method for the deep foundation pit dewatering in the sandy gravel stratum as claimed in claim 7, characterized in that:
R＝2S(KH0)1/2
in the formula, S is the water level depth, and the unit is m;
k is the permeability coefficient, and the unit is m/day;
H0the thickness of the aqueous layer in m.
10. The intelligent control method for the deep foundation pit dewatering in the sandy gravel stratum as claimed in claim 7, characterized in that:
r0＝(A/π)1/2
wherein, A is the area of the foundation pit and the unit is m2。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111062653.9A CN113832999A (en) | 2021-09-10 | 2021-09-10 | Intelligent control system and control method for sand-gravel stratum deep foundation pit dewatering |
| CH000644/2022A CH719023B1 (en) | 2021-09-10 | 2022-05-27 | System and method for controlling the lowering of water levels in foundation excavations in sand and pebble strata. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111062653.9A CN113832999A (en) | 2021-09-10 | 2021-09-10 | Intelligent control system and control method for sand-gravel stratum deep foundation pit dewatering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113832999A true CN113832999A (en) | 2021-12-24 |
Family
ID=78958903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111062653.9A Pending CN113832999A (en) | 2021-09-10 | 2021-09-10 | Intelligent control system and control method for sand-gravel stratum deep foundation pit dewatering |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113832999A (en) |
| CH (1) | CH719023B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115492142A (en) * | 2022-06-25 | 2022-12-20 | 中建五局土木工程有限公司 | Monitoring and control system for uneven dewatering and draining of large-scale deep foundation pit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5639380A (en) * | 1994-05-31 | 1997-06-17 | Misquitta; Neale J. | System for automating groundwater recovery controlled by monitoring parameters in monitoring wells |
| CN110387896A (en) * | 2019-06-28 | 2019-10-29 | 中交路桥北方工程有限公司 | Base pit dewatering well design method |
| CN110863504A (en) * | 2019-12-02 | 2020-03-06 | 河南科技大学 | Pipe well dewatering construction method |
-
2021
- 2021-09-10 CN CN202111062653.9A patent/CN113832999A/en active Pending
-
2022
- 2022-05-27 CH CH000644/2022A patent/CH719023B1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5639380A (en) * | 1994-05-31 | 1997-06-17 | Misquitta; Neale J. | System for automating groundwater recovery controlled by monitoring parameters in monitoring wells |
| CN110387896A (en) * | 2019-06-28 | 2019-10-29 | 中交路桥北方工程有限公司 | Base pit dewatering well design method |
| CN110863504A (en) * | 2019-12-02 | 2020-03-06 | 河南科技大学 | Pipe well dewatering construction method |
Non-Patent Citations (3)
| Title |
|---|
| 冯先导等: "临江砂卵石地层井群降水试验及数值反演研究", 《中国港湾建设》 * |
| 施成华等: "考虑降水动态过程的地下工程施工降水优化设计", 《铁道科学与工程学报》 * |
| 陈文华等: "最优化法在深基坑降水工程中的应用", 《岩土工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115492142A (en) * | 2022-06-25 | 2022-12-20 | 中建五局土木工程有限公司 | Monitoring and control system for uneven dewatering and draining of large-scale deep foundation pit |
| CN115492142B (en) * | 2022-06-25 | 2024-04-09 | 中建五局土木工程有限公司 | Monitoring and control system for non-uniform water lowering and draining of large deep foundation pit |
Also Published As
| Publication number | Publication date |
|---|---|
| CH719023A2 (en) | 2023-03-15 |
| CH719023B1 (en) | 2023-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106337426B (en) | It is a kind of to increase the anti-prominent precipitation method for gushing stability of artesian water stratum foundation pit | |
| CN104831762B (en) | Deep basal pit artesian water precipitation dynamic monitoring system and monitoring method | |
| CN100580221C (en) | Construction method for shallow soil-covered river bed under shield tunnel | |
| CN103603342B (en) | Major diameter assembled casing super-long filling pile construction method | |
| CN111191849B (en) | Method for predicting water inflow of deep-buried working face in western mining area | |
| CN101215969A (en) | Large diameter tunneling close range down-traversing small diameter subway tunnel distortion control method | |
| CN102108707A (en) | Huge ultradeep foundation pit accurate subsidence and environmentally-friendly construction method | |
| CN107587516A (en) | A kind of efficient sealing of Follow-up type hinders sand precipitation hybrid system and its construction method | |
| CN112926111B (en) | Suspension type curtain foundation pit seepage calculation method based on improved resistance coefficient method | |
| CN109610525A (en) | A kind of method of quick judgement water-stop curtain construction quality | |
| CN110387896A (en) | Base pit dewatering well design method | |
| CN110984132B (en) | Construction method for grooving underground diaphragm wall under complex geological condition | |
| CN112836270A (en) | Method for predicting influence of diving precipitation on building settlement | |
| CN113832999A (en) | Intelligent control system and control method for sand-gravel stratum deep foundation pit dewatering | |
| CN108425359A (en) | A method of precipitation effect on environment is controlled using groundwater recharge | |
| CN102587345B (en) | Multi-wave stacking intermittent recharge construction method based on water level control | |
| CN105200994A (en) | Construction method for reserved shield crossing composite foundation pit support device | |
| CN203960941U (en) | A kind of artesian water water intake well | |
| CN116029142A (en) | Calculation method for water pumping quantity of incomplete well of diving aquifer | |
| CN102094431A (en) | Horizontal plugging construction method for subway station construction confined water | |
| CN105256681B (en) | The roadbed filling system and method for soil horizontal displacement is automatically controlled on soft base | |
| CN104141295A (en) | Soft soil foundation combined treatment method | |
| CN117780354B (en) | Method for reinforcing bottom of shaft of coal mine vertical shaft to be built by thick loose layer thin bedrock by sparse-filling | |
| CN217203970U (en) | Seepage control system of deep overburden in-situ test well | |
| CN116927178B (en) | Construction method of granite boulder geological underground diaphragm wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211224 |